Tk_Name


HOME

Tk_Name

NAME
SYNOPSIS
ARGUMENTS
DESCRIPTION
KEYWORDS

___________________________

NAME

Tk_Name, Tk_PathName, Tk_NameToWindow − convert between names and window tokens

SYNOPSIS

#include <tk.h>

Tk_Uid
Tk_Name
(tkwin)

char *
Tk_PathName
(tkwin)

Tk_Window
Tk_NameToWindow
(interp, pathName, tkwin)

ARGUMENTS

Tk_Window tkwin (in)

Token for window.

Tcl_Interp *interp (out)

Interpreter to use for error reporting.

const char *pathName (in)

Character string containing path name of window.

______________

DESCRIPTION

Each window managed by Tk has two names, a short name that identifies a window among children of the same parent, and a path name that identifies the window uniquely among all the windows belonging to the same main window. The path name is used more often in Tk than the short name; many commands, like bind, expect path names as arguments.

The Tk_Name macro returns a window’s short name, which is the same as the name argument passed to Tk_CreateWindow when the window was created. The value is returned as a Tk_Uid, which may be used just like a string pointer but also has the properties of a unique identifier (see the manual entry for Tk_GetUid for details).

The Tk_PathName macro returns a hierarchical name for tkwin. Path names have a structure similar to file names in Unix but with dots between elements instead of slashes: the main window for an application has the path name “.”; its children have names like “.a” and “.b”; their children have names like “.a.aa” and “.b.bb”; and so on. A window is considered to be a child of another window for naming purposes if the second window was named as the first window’s parent when the first window was created. This is not always the same as the X window hierarchy. For example, a pop-up is created as a child of the root window, but its logical parent will usually be a window within the application.

The procedure Tk_NameToWindow returns the token for a window given its path name (the pathName argument) and another window belonging to the same main window (tkwin). It normally returns a token for the named window, but if no such window exists Tk_NameToWindow leaves an error message in interp->result and returns NULL. The tkwin argument to Tk_NameToWindow is needed because path names are only unique within a single application hierarchy. If, for example, a single process has opened two main windows, each will have a separate naming hierarchy and the same path name might appear in each of the hierarchies. Normally tkwin is the main window of the desired hierarchy, but this need not be the case: any window in the desired hierarchy may be used.

KEYWORDS

name, path name, token, window






Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.